civil engineering MCQs – Page 168

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs
3341. A stone is thrown up a slope of inclination 60 to the horizontal. At what angle to the slope must the stone be thrown so as to land as far as possible from the point of projection ?
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A. 45

B. 15

C. 30

D. 75

3342. A circular disc rotates at n rpm. The angular velocity of a circular ring of same mass and radius as the disc and to have the same angular momentum is___________________?
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A. 2n rpm

B. n/2 rpm

C. n rpm

D. n/4 rpm

3343. At the instantaneous center, the velocity of the moving lamina at any instant is_________________?
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A. varying

B. minimum

C. maximum

D. zero
3344. Which of the following represents the state of neutral equilibrium ?
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A. none of the above

B. a cube resting on one edge

C. a smooth cylinder lying on a curved surface

D. a smooth cylinder lying on a convex surface

3345. The total kinetic energy of a hoop of mass 2 kg and radius 4 m sliding with linear velocity 8 m/sec and angular velocity 5 radian/sec is_________________?
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A. 464 J

B. 64 J

C. 400 J

D. 89 J

3346. For a given velocity of a projectile, the range is maximum when the angle of projection is___________________?
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A. 90

B. 0

C. 30

D. 45
3347. A solid sphere of mass M and radius R rolls down a plane inclined at 0 with the horizontal. The acceleration of sphere is_______________?
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A. (1/3) g sin0

B. (3/7) g sin 0

C. (5/7) g sin0

D. (2/5) g sin 0

3348. A quantity measured in the C.G.S system of units has dimensions M2L3 T3/2. What numerical factor would be required to convert the quantity to SI units ?
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A. 100

B. 1/100

C. 1

D. 1/10000

3349. The potential energy of a particle falling through a straight shaft drilled through the earth (assumed homogenous and spherical) is proportional to____________________?
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A. 1/r

B. r

C. log r

D. r2
3350. If the kinetic energy and potential energy of a simple harmonic oscillator of amplitude A are both equal to half the total energy, then the displacement is equal to_________________?
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A. A/2

B. A/V2

C. AV2

D. A

3351. A particle of mass 2 kg executes simple harmonic motion of frequency 6/71 Hz and amplitude 0.25 m. Its maximum kinetic energy is___________________?
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A. 4.5 J

B. 18.0 J

C. 12.0 J

D. 9.0 J
3352. A simple pendulum of length / has an energy E, when its amplitude is A. If the length of pendulum is doubled, the energy will be___________________?
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A. E/2

B. E

C. 2E

D. 4E

3353. A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about__________________?
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A. 3-Jan

B. 1/4

C. 5-Jan

D. 2-Jan

3354. A flywheel of moment of inertia 20 kg-m is acted upon by a tangential force of 5 N at 2 m from its axis, for 3 seconds. The increase in angular velocity in radian persecond is__________________?
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A. 2-Jan

B. 3

C. 3/2

D. 2

3355. The angular speed of a car while taking a circular turn of radius 100m at 36 km/hour, is_______________?
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A. 1 radian/sec

B. 1000 radian/sec

C. 0.1 radian/sec

D. 100 radian/sec

3356. When two forces, each equal to P, act at 90 to each other, then the resultant will be_____________?
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A. P/V2

B. PV2

C. 2P

D. P

3357. A rod AB carries three loads of 30 N, 70 N and 100 N at distances of 20 mm, 90 mm and 150 mm respectively from A. Neglecting the weight of the rod, the point at which the rod will balance is_______________?
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A. 119.5 mm from A

B. 109.5 mm from A

C. 132.5 mm from A

D. 125.5 mm from A

3358. If A is the amplitude of particle executing simple harmonic motion, then the total energy E of the particle is___________________?
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A. proportional to A2

B. independent of A

C. proportional to A

D. proportional to 1/A2

3359. The dimensions of Gravitational Universal constant G are______________?
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A. ML3T2

B. M-L2r2

C. M-L3r2

D. M-2L3T2

3360. Minimum potential energy of a system will be in the position of________________?
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A. stable equilibrium

B. unstable equilibrium

C. neutral equilibrium

D. all of the above